Colorado Revised Statutes Title 36. Natural Resources General § 36-2-102. Declaration of occupation

All rights of occupancy, possession, and enjoyment of any tract or portion of the public domain, except mining claims, acquired after January 10, 1868, shall be expressed and described in a declaration, in cases of original occupation, and by a deed in cases of purchase, duly acknowledged by some officer authorized to take acknowledgments of deeds, and recorded in the office of the recorder of the county in which the land is situated.